Global patent index - EP 0598496 B1

EP 0598496 B1 2001-01-03 - Frequency drop-out compensation

Title (en)

Frequency drop-out compensation

Title (de)

Kompensation von Frequenzausfall

Title (fr)

Compensation de perte du signal de fréquence

Publication

EP 0598496 B1 (EN)

Application

EP 93308371 A

Priority

KR 920019425 A

Abstract (en)

[origin: EP0598496A1] A frequency drop-out compensating circuit for both NTSC and PAL systems in an optical disk system includes amplifiers 10, 20 and 30 for amplifying an applied FM signal, a pulse generator 50 for converting a frequency drop-out signal detected from the amplified FM signal into a pulse signal and a drop-out compensator 60 for compensating the drop-out when a frequency drop for the signal generated from the pulse generator 50 is generated. An integrator 41 integrates the FM signal generated from the amplifiers 10, 20 and 30 and an integrating current controller 42 controls the integrating current of the integrator 41 according to the applied FM signal. Therefore, drop-out can be detected and compensated in signals for both NTSC and PAL systems, by controlling the integrating current in consideration of the FM band utilized. <IMAGE>

IPC 1-7 (main, further and additional classification)

H04N 9/88

IPC 8 full level (invention and additional information)

H04N 5/94 (2006.01); H04N 9/79 (2006.01); H04N 9/80 (2006.01); H04N 9/88 (2006.01); H04N 9/82 (2006.01); H04N 9/835 (2006.01)

CPC (invention and additional information)

H04N 9/88 (2013.01); H04N 9/7925 (2013.01); H04N 9/8222 (2013.01); H04N 9/835 (2013.01)

Designated contracting state (EPC)

DE FR GB

EPO simple patent family

EP 0598496 A1 19940525; EP 0598496 B1 20010103; DE 69329817 D1 20010208; DE 69329817 T2 20010503; JP 2941616 B2 19990825; JP H06225338 A 19940812; KR 0165251 B1 19990320; US 5438425 A 19950801

INPADOC legal status

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2001-02-08 [REF] CORRESPONDS TO:

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